[PATCH v2 0/3] usb: dwc3: Add support for AM654 USB

[PATCH v2 0/3] usb: dwc3: Add support for AM654 USB

[Roger Quadros]

Hi Felipe,

TI's AM654 USB SoC has 2 instances of the DWC3 controller.
This series adds AM654 USB wrapper support to the keystone-usb driver.

Changelog:
v2:
- Moved compatible to separate lines in DT binding.

cheers,
-roger

Roger Quadros (3):
  usb: dwc3: gadget: Fix OTG events when gadget driver isn't loaded
  dt-bindings: usb: keystone-usb: Add ti,am654-dwc3 support
  usb: dwc3: keystone: Add support for ti,am654-dwc3

 Documentation/devicetree/bindings/usb/keystone-usb.txt |  6 ++++--
 drivers/usb/dwc3/Kconfig                               |  6 +++---
 drivers/usb/dwc3/dwc3-keystone.c                       | 11 ++++++++++-
 drivers/usb/dwc3/gadget.c                              |  2 ++
 4 files changed, 19 insertions(+), 6 deletions(-)

-- 
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Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v2 1/3] usb: dwc3: gadget: Fix OTG events when gadget driver isn't loaded

[Roger Quadros]

On v3.10a in dual-role mode, if port is in device mode
and gadget driver isn't loaded, the OTG event interrupts don't
come through.

It seems that if the core is configured to be OTG2.0 only,
then we can't leave the DCFG.DEVSPD at Super-speed (default)
if we expect OTG to work properly. It must be set to High-speed.

Fix this issue by configuring DCFG.DEVSPD to the supported
maximum speed at gadget init. Device tree still needs to provide
correct supported maximum speed for this to work.

This issue wasn't present on v2.40a but is seen on v3.10a.
It doesn't cause any side effects on v2.40a.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
 drivers/usb/dwc3/gadget.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 07bd31b..a9cf4dd4 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -3337,6 +3337,8 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 		goto err4;
 	}
 
+	dwc3_gadget_set_speed(&dwc->gadget, dwc->maximum_speed);
+
 	return 0;
 
 err4:
-- 
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Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v2 2/3] dt-bindings: usb: keystone-usb: Add ti,am654-dwc3 support

[Roger Quadros]

The AM654 SoC from TI contains a DWC3 controller. Add
support for it.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 Documentation/devicetree/bindings/usb/keystone-usb.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/keystone-usb.txt b/Documentation/devicetree/bindings/usb/keystone-usb.txt
index f96e09f..77df82e 100644
--- a/Documentation/devicetree/bindings/usb/keystone-usb.txt
+++ b/Documentation/devicetree/bindings/usb/keystone-usb.txt
@@ -3,7 +3,9 @@ TI Keystone Soc USB Controller
 DWC3 GLUE
 
 Required properties:
- - compatible: should be "ti,keystone-dwc3".
+ - compatible: should be
+		"ti,keystone-dwc3" for Keystone 2 SoCs
+		"ti,am654-dwc3" for AM654 SoC
  - #address-cells, #size-cells : should be '1' if the device has sub-nodes
    with 'reg' property.
  - reg : Address and length of the register set for the USB subsystem on
@@ -21,7 +23,7 @@ SoCs only:
 - clock-names:		Must be "usb".
 
 
-The following are mandatory properties for Keystone 2 66AK2G SoCs only:
+The following are mandatory properties for 66AK2G and AM654:
 
 - power-domains:	Should contain a phandle to a PM domain provider node
 			and an args specifier containing the USB device id
-- 
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Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Re: [PATCH v2 2/3] dt-bindings: usb: keystone-usb: Add ti,am654-dwc3 support

[Rob Herring]

On Thu, 10 Jan 2019 17:04:29 +0200, Roger Quadros wrote:
> The AM654 SoC from TI contains a DWC3 controller. Add
> support for it.
> 
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>  Documentation/devicetree/bindings/usb/keystone-usb.txt | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

[PATCH v2 3/3] usb: dwc3: keystone: Add support for ti,am654-dwc3

[Roger Quadros]

The AM654 SoC contains a DWC3 controller with TI specific
wrapper. Add support for that.

Unlike the Keystone 2 case, for AM654 We don't need to
process any IRQs for basic USB operation.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 drivers/usb/dwc3/Kconfig         |  6 +++---
 drivers/usb/dwc3/dwc3-keystone.c | 11 ++++++++++-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 1a0404f..34d9ce2 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -86,11 +86,11 @@ config USB_DWC3_HAPS
 	  platform, please say 'Y' or 'M' here.
 
 config USB_DWC3_KEYSTONE
-	tristate "Texas Instruments Keystone2 Platforms"
-	depends on ARCH_KEYSTONE || COMPILE_TEST
+	tristate "Texas Instruments Keystone2/AM654 Platforms"
+	depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
 	default USB_DWC3
 	help
-	  Support of USB2/3 functionality in TI Keystone2 platforms.
+	  Support of USB2/3 functionality in TI Keystone2 and AM654 platforms.
 	  Say 'Y' or 'M' here if you have one such device
 
 config USB_DWC3_OF_SIMPLE
diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
index 193a9a8..cbee5fb 100644
--- a/drivers/usb/dwc3/dwc3-keystone.c
+++ b/drivers/usb/dwc3/dwc3-keystone.c
@@ -106,6 +106,10 @@ static int kdwc3_probe(struct platform_device *pdev)
 		goto err_irq;
 	}
 
+	/* IRQ processing not required currently for AM65 */
+	if (of_device_is_compatible(node, "ti,am654-dwc3"))
+		goto skip_irq;
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "missing irq\n");
@@ -123,6 +127,7 @@ static int kdwc3_probe(struct platform_device *pdev)
 
 	kdwc3_enable_irqs(kdwc);
 
+skip_irq:
 	error = of_platform_populate(node, NULL, NULL, dev);
 	if (error) {
 		dev_err(&pdev->dev, "failed to create dwc3 core\n");
@@ -152,8 +157,11 @@ static int kdwc3_remove_core(struct device *dev, void *c)
 static int kdwc3_remove(struct platform_device *pdev)
 {
 	struct dwc3_keystone *kdwc = platform_get_drvdata(pdev);
+	struct device_node *node = pdev->dev.of_node;
+
+	if (!of_device_is_compatible(node, "ti,am654-dwc3"))
+		kdwc3_disable_irqs(kdwc);
 
-	kdwc3_disable_irqs(kdwc);
 	device_for_each_child(&pdev->dev, NULL, kdwc3_remove_core);
 	pm_runtime_put_sync(kdwc->dev);
 	pm_runtime_disable(kdwc->dev);
@@ -165,6 +173,7 @@ static int kdwc3_remove(struct platform_device *pdev)
 
 static const struct of_device_id kdwc3_of_match[] = {
 	{ .compatible = "ti,keystone-dwc3", },
+	{ .compatible = "ti,am654-dwc3" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, kdwc3_of_match);
-- 
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Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki